test/test_dvr.py

   1 #!/usr/bin/env python
   2 import unittest
   3
   4 from framework import VppTestCase, VppTestRunner
   5 from vpp_sub_interface import VppDot1QSubint
   6 from vpp_ip_route import VppIpRoute, VppRoutePath
   7 from vpp_papi_provider import L2_VTR_OP, L2_PORT_TYPE
   8
   9 from scapy.packet import Raw
  10 from scapy.layers.l2 import Ether, Dot1Q
  11 from scapy.layers.inet import IP, UDP
  12 from socket import AF_INET, inet_pton
  13
  14
  15 class TestDVR(VppTestCase):
  16     """ Distributed Virtual Router """
  17
  18     def setUp(self):
  19         super(TestDVR, self).setUp()
  20
  21         self.create_pg_interfaces(range(4))
  22         self.create_loopback_interfaces(1)
  23
  24         for i in self.pg_interfaces:
  25             i.admin_up()
  26
  27         self.loop0.config_ip4()
  28
  29     def tearDown(self):
  30         for i in self.pg_interfaces:
  31             i.admin_down()
  32         self.loop0.unconfig_ip4()
  33
  34         super(TestDVR, self).tearDown()
  35
  36     def assert_same_mac_addr(self, tx, rx):
  37         t_eth = tx[Ether]
  38         for p in rx:
  39             r_eth = p[Ether]
  40             self.assertEqual(t_eth.src, r_eth.src)
  41             self.assertEqual(t_eth.dst, r_eth.dst)
  42
  43     def assert_has_vlan_tag(self, tag, rx):
  44         for p in rx:
  45             r_1q = p[Dot1Q]
  46             self.assertEqual(tag, r_1q.vlan)
  47
  48     def assert_has_no_tag(self, rx):
  49         for p in rx:
  50             self.assertFalse(p.haslayer(Dot1Q))
  51
  52     def test_dvr(self):
  53         """ Distributed Virtual Router """
  54
  55         #
  56         # A packet destined to an IP address that is L2 bridged via
  57         # a non-tag interface
  58         #
  59         ip_non_tag_bridged = "10.10.10.10"
  60         ip_tag_bridged = "10.10.10.11"
  61         any_src_addr = "1.1.1.1"
  62
  63         pkt_no_tag = (Ether(src=self.pg0.remote_mac,
  64                             dst=self.loop0.local_mac) /
  65                       IP(src=any_src_addr,
  66                          dst=ip_non_tag_bridged) /
  67                       UDP(sport=1234, dport=1234) /
  68                       Raw('\xa5' * 100))
  69         pkt_tag = (Ether(src=self.pg0.remote_mac,
  70                          dst=self.loop0.local_mac) /
  71                    IP(src=any_src_addr,
  72                       dst=ip_tag_bridged) /
  73                    UDP(sport=1234, dport=1234) /
  74                    Raw('\xa5' * 100))
  75
  76         #
  77         # Two sub-interfaces so we can test VLAN tag push/pop
  78         #
  79         sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
  80         sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
  81         sub_if_on_pg2.admin_up()
  82         sub_if_on_pg3.admin_up()
  83
  84         #
  85         # Put all the interfaces into a new bridge domain
  86         #
  87         self.vapi.sw_interface_set_l2_bridge(
  88             rx_sw_if_index=self.pg0.sw_if_index, bd_id=1)
  89         self.vapi.sw_interface_set_l2_bridge(
  90             rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
  91         self.vapi.sw_interface_set_l2_bridge(
  92             rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1)
  93         self.vapi.sw_interface_set_l2_bridge(
  94             rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1)
  95         self.vapi.sw_interface_set_l2_bridge(
  96             rx_sw_if_index=self.loop0.sw_if_index, bd_id=1,
  97             port_type=L2_PORT_TYPE.BVI)
  98
  99         self.vapi.l2_interface_vlan_tag_rewrite(
 100             sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
 101             push_dot1q=92)
 102         self.vapi.l2_interface_vlan_tag_rewrite(
 103             sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
 104             push_dot1q=93)
 105
 106         #
 107         # Add routes to bridge the traffic via a tagged an nontagged interface
 108         #
 109         route_no_tag = VppIpRoute(
 110             self, ip_non_tag_bridged, 32,
 111             [VppRoutePath("0.0.0.0",
 112                           self.pg1.sw_if_index,
 113                           is_dvr=1)])
 114         route_no_tag.add_vpp_config()
 115
 116         #
 117         # Inject the packet that arrives and leaves on a non-tagged interface
 118         # Since it's 'bridged' expect that the MAC headed is unchanged.
 119         #
 120         rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
 121         self.assert_same_mac_addr(pkt_no_tag, rx)
 122         self.assert_has_no_tag(rx)
 123
 124         #
 125         # Add routes to bridge the traffic via a tagged interface
 126         #
 127         route_with_tag = VppIpRoute(
 128             self, ip_tag_bridged, 32,
 129             [VppRoutePath("0.0.0.0",
 130                           sub_if_on_pg3.sw_if_index,
 131                           is_dvr=1)])
 132         route_with_tag.add_vpp_config()
 133
 134         #
 135         # Inject the packet that arrives non-tag and leaves on a tagged
 136         # interface
 137         #
 138         rx = self.send_and_expect(self.pg0, pkt_tag * 65, self.pg3)
 139         self.assert_same_mac_addr(pkt_tag, rx)
 140         self.assert_has_vlan_tag(93, rx)
 141
 142         #
 143         # Tag to tag
 144         #
 145         pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac,
 146                                 dst=self.loop0.local_mac) /
 147                           Dot1Q(vlan=92) /
 148                           IP(src=any_src_addr,
 149                              dst=ip_tag_bridged) /
 150                           UDP(sport=1234, dport=1234) /
 151                           Raw('\xa5' * 100))
 152
 153         rx = self.send_and_expect(self.pg2, pkt_tag_to_tag * 65, self.pg3)
 154         self.assert_same_mac_addr(pkt_tag_to_tag, rx)
 155         self.assert_has_vlan_tag(93, rx)
 156
 157         #
 158         # Tag to non-Tag
 159         #
 160         pkt_tag_to_non_tag = (Ether(src=self.pg2.remote_mac,
 161                                     dst=self.loop0.local_mac) /
 162                               Dot1Q(vlan=92) /
 163                               IP(src=any_src_addr,
 164                                  dst=ip_non_tag_bridged) /
 165                               UDP(sport=1234, dport=1234) /
 166                               Raw('\xa5' * 100))
 167
 168         rx = self.send_and_expect(self.pg2, pkt_tag_to_non_tag * 65, self.pg1)
 169         self.assert_same_mac_addr(pkt_tag_to_tag, rx)
 170         self.assert_has_no_tag(rx)
 171
 172         #
 173         # Add an output L3 ACL that will block the traffic
 174         #
 175         rule_1 = ({'is_permit': 0,
 176                    'is_ipv6': 0,
 177                    'proto': 17,
 178                    'srcport_or_icmptype_first': 1234,
 179                    'srcport_or_icmptype_last': 1234,
 180                    'src_ip_prefix_len': 32,
 181                    'src_ip_addr': inet_pton(AF_INET, any_src_addr),
 182                    'dstport_or_icmpcode_first': 1234,
 183                    'dstport_or_icmpcode_last': 1234,
 184                    'dst_ip_prefix_len': 32,
 185                    'dst_ip_addr': inet_pton(AF_INET, ip_non_tag_bridged)})
 186         acl = self.vapi.acl_add_replace(acl_index=4294967295,
 187                                         r=[rule_1])
 188
 189         #
 190         # Apply the ACL on the output interface
 191         #
 192         self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
 193                                              0,
 194                                              [acl.acl_index])
 195
 196         #
 197         # Send packet's that should match the ACL and be dropped
 198         #
 199         rx = self.send_and_assert_no_replies(self.pg2, pkt_tag_to_non_tag * 65)
 200
 201         #
 202         # cleanup
 203         #
 204         self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
 205                                              0, [])
 206         self.vapi.acl_del(acl.acl_index)
 207
 208         self.vapi.sw_interface_set_l2_bridge(
 209             rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0)
 210         self.vapi.sw_interface_set_l2_bridge(
 211             rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
 212         self.vapi.sw_interface_set_l2_bridge(
 213             rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0)
 214         self.vapi.sw_interface_set_l2_bridge(
 215             rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0)
 216         self.vapi.sw_interface_set_l2_bridge(
 217             rx_sw_if_index=self.loop0.sw_if_index, bd_id=1,
 218             port_type=L2_PORT_TYPE.BVI, enable=0)
 219
 220         #
 221         # Do a FIB dump to make sure the paths are correctly reported as DVR
 222         #
 223         routes = self.vapi.ip_fib_dump()
 224
 225         for r in routes:
 226             if (inet_pton(AF_INET, ip_tag_bridged) == r.address):
 227                 self.assertEqual(r.path[0].sw_if_index,
 228                                  sub_if_on_pg3.sw_if_index)
 229                 self.assertEqual(r.path[0].is_dvr, 1)
 230             if (inet_pton(AF_INET, ip_non_tag_bridged) == r.address):
 231                 self.assertEqual(r.path[0].sw_if_index,
 232                                  self.pg1.sw_if_index)
 233                 self.assertEqual(r.path[0].is_dvr, 1)
 234
 235         #
 236         # the explicit route delete is require so it happens before
 237         # the sbu-interface delete. subinterface delete is required
 238         # because that object type does not use the object registry
 239         #
 240         route_no_tag.remove_vpp_config()
 241         route_with_tag.remove_vpp_config()
 242         sub_if_on_pg3.remove_vpp_config()
 243         sub_if_on_pg2.remove_vpp_config()
 244
 245     def test_l2_emulation(self):
 246         """ L2 Emulation """
 247
 248         #
 249         # non distinct L3 packets, in the tag/non-tag combos
 250         #
 251         pkt_no_tag = (Ether(src=self.pg0.remote_mac,
 252                             dst=self.pg1.remote_mac) /
 253                       IP(src="2.2.2.2",
 254                          dst="1.1.1.1") /
 255                       UDP(sport=1234, dport=1234) /
 256                       Raw('\xa5' * 100))
 257         pkt_to_tag = (Ether(src=self.pg0.remote_mac,
 258                             dst=self.pg2.remote_mac) /
 259                       IP(src="2.2.2.2",
 260                          dst="1.1.1.2") /
 261                       UDP(sport=1234, dport=1234) /
 262                       Raw('\xa5' * 100))
 263         pkt_from_tag = (Ether(src=self.pg3.remote_mac,
 264                               dst=self.pg2.remote_mac) /
 265                         Dot1Q(vlan=93) /
 266                         IP(src="2.2.2.2",
 267                            dst="1.1.1.1") /
 268                         UDP(sport=1234, dport=1234) /
 269                         Raw('\xa5' * 100))
 270         pkt_from_to_tag = (Ether(src=self.pg3.remote_mac,
 271                                  dst=self.pg2.remote_mac) /
 272                            Dot1Q(vlan=93) /
 273                            IP(src="2.2.2.2",
 274                               dst="1.1.1.2") /
 275                            UDP(sport=1234, dport=1234) /
 276                            Raw('\xa5' * 100))
 277         pkt_bcast = (Ether(src=self.pg0.remote_mac,
 278                            dst="ff:ff:ff:ff:ff:ff") /
 279                      IP(src="2.2.2.2",
 280                         dst="255.255.255.255") /
 281                      UDP(sport=1234, dport=1234) /
 282                      Raw('\xa5' * 100))
 283
 284         #
 285         # A couple of sub-interfaces for tags
 286         #
 287         sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
 288         sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
 289         sub_if_on_pg2.admin_up()
 290         sub_if_on_pg3.admin_up()
 291
 292         #
 293         # Put all the interfaces into a new bridge domain
 294         #
 295         self.vapi.sw_interface_set_l2_bridge(
 296             rx_sw_if_index=self.pg0.sw_if_index, bd_id=1)
 297         self.vapi.sw_interface_set_l2_bridge(
 298             rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
 299         self.vapi.sw_interface_set_l2_bridge(
 300             rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1)
 301         self.vapi.sw_interface_set_l2_bridge(
 302             rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1)
 303         self.vapi.l2_interface_vlan_tag_rewrite(
 304             sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
 305             push_dot1q=92)
 306         self.vapi.l2_interface_vlan_tag_rewrite(
 307             sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
 308             push_dot1q=93)
 309
 310         #
 311         # Disable UU flooding, learning and ARP termination. makes this test
 312         # easier as unicast packets are dropped if not extracted.
 313         #
 314         self.vapi.bridge_flags(bd_id=1, is_set=0,
 315                                flags=(1 << 0) | (1 << 3) | (1 << 4))
 316
 317         #
 318         # Add a DVR route to steer traffic at L3
 319         #
 320         route_1 = VppIpRoute(self, "1.1.1.1", 32,
 321                              [VppRoutePath("0.0.0.0",
 322                                            self.pg1.sw_if_index,
 323                                            is_dvr=1)])
 324         route_2 = VppIpRoute(self, "1.1.1.2", 32,
 325                              [VppRoutePath("0.0.0.0",
 326                                            sub_if_on_pg2.sw_if_index,
 327                                            is_dvr=1)])
 328         route_1.add_vpp_config()
 329         route_2.add_vpp_config()
 330
 331         #
 332         # packets are dropped because bridge does not flood unknown unicast
 333         #
 334         self.send_and_assert_no_replies(self.pg0, pkt_no_tag)
 335
 336         #
 337         # Enable L3 extraction on pgs
 338         #
 339         self.vapi.l2_emulation(self.pg0.sw_if_index)
 340         self.vapi.l2_emulation(self.pg1.sw_if_index)
 341         self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index)
 342         self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index)
 343
 344         #
 345         # now we expect the packet forward according to the DVR route
 346         #
 347         rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
 348         self.assert_same_mac_addr(pkt_no_tag, rx)
 349         self.assert_has_no_tag(rx)
 350
 351         rx = self.send_and_expect(self.pg0, pkt_to_tag * 65, self.pg2)
 352         self.assert_same_mac_addr(pkt_to_tag, rx)
 353         self.assert_has_vlan_tag(92, rx)
 354
 355         rx = self.send_and_expect(self.pg3, pkt_from_tag * 65, self.pg1)
 356         self.assert_same_mac_addr(pkt_from_tag, rx)
 357         self.assert_has_no_tag(rx)
 358
 359         rx = self.send_and_expect(self.pg3, pkt_from_to_tag * 65, self.pg2)
 360         self.assert_same_mac_addr(pkt_from_tag, rx)
 361         self.assert_has_vlan_tag(92, rx)
 362
 363         #
 364         # but broadcast packets are still flooded
 365         #
 366         self.send_and_expect(self.pg0, pkt_bcast * 33, self.pg2)
 367
 368         #
 369         # cleanup
 370         #
 371         self.vapi.l2_emulation(self.pg0.sw_if_index,
 372                                enable=0)
 373         self.vapi.l2_emulation(self.pg1.sw_if_index,
 374                                enable=0)
 375         self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index,
 376                                enable=0)
 377         self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index,
 378                                enable=0)
 379
 380         self.vapi.sw_interface_set_l2_bridge(
 381             rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0)
 382         self.vapi.sw_interface_set_l2_bridge(
 383             rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
 384         self.vapi.sw_interface_set_l2_bridge(
 385             rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0)
 386         self.vapi.sw_interface_set_l2_bridge(
 387             rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0)
 388
 389         route_1.remove_vpp_config()
 390         route_2.remove_vpp_config()
 391         sub_if_on_pg3.remove_vpp_config()
 392         sub_if_on_pg2.remove_vpp_config()
 393
 394
 395 if __name__ == '__main__':
 396     unittest.main(testRunner=VppTestRunner)